[nuz69]

Coreyfro, it's just some suppositions but here is my opinion :
When you put a 4 poles rotor instead a 2 poles, you divide the Kv by 2, but the Kt (torque coefficient) rise by 2, that mean for the same amp draw, you have twice the torque you would have with the 2 poles and as the RPM drops too there is less magnetic losses in the stator. So the 4 poles motor would be more efficient and would handle more power if it has to, or will consume less power for the same performance
Obviously the stator of a 4 poles motor is designed differently than a 2 pole motor (more slots) but here is the idea...